Conditional Branching

Unconditional branching is just calling a subroutine or function on the subsequent line.
There are several different ways you can implement conditional branching.

If - Then - Else

If (iValue > 10) Then 
   Call MsgBox("number is greater than 10") 
Else 
   Call MsgBox("number is less than or equal to 10") 
End If

Select - Case

Select Case sText 
   Case "Match 1": Call Proc1() 
   Case "Match 2": Call Proc2() 
   Case Else: Call Proc3() 
End Select

Immediate IF

Dim iNumber As Integer 
iNumber = 50 
Call Msgbox( IIf( iNumber > 40, "over forty", "less than forty") )